第1题: [单项选择]某纺织印染废水的进水COD为1200mg/L,BOD5为250mg/L,PH值为中性,采用下述哪种处理工艺较为经济实用,且满足处理后出水COD≤100mg/L的要求() A. 调节→厌氧→好氧→排放 B. 调节→水解酸化→好氧→混凝沉淀→排放 C. 调节→化学投药→水解酸化→好氧→排放 D. 调节→厌氧→水解酸化→好氧→混凝沉淀→排放 参考答案:B
A. their stupidity B. their vulnerability C. the possible dangers in the ocean D. their small size 参考答案:C 答案解析:这道细节题相关的信息在第三段。“There is,by and large,no place to hide in the ocean,” A,B和D三项都与第三段开头两句表达的意思无关,只有C项比
第37题: [单项选择]Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______of the quality of their products. A. expense B. expansion C. exposure D. expectation 参考答案:A 答案解析:[解析] at the expense of sth.以……为代价。at the expense of the quality of products以产品质量为代价。故选A项。